The door of the box-type substation enclosure should open outward. It should be equipped with a handle, a concealed latch and a lock. The latch and lock should be rust-proof. The transformer room should mainly rely on natural ventilation. Provide a curve showing the relationship between the box temperature and the transformer output. The transformer room can be equipped with a room temperature monitoring device and a self-starting ventilation and cooling device as needed to ensure that the transformer operates at full load under the specified environmental conditions. The transformer should be able to enter and exit from the top or side door of the box-type substation. The noise level of the box-type substation should not exceed the specified noise level of the transformer. Regardless of whether the enclosure is made of metal or non-metal materials, the metal frame of the box should have good grounding, have grounding terminals, and be marked with the grounding symbol. 

The box-type substation is mainly cooled by natural air circulation. Therefore, no unauthorized items should be piled up around it. In particular, the door of the transformer room should not be blocked. Regularly, the attachments on the ventilation holes of the louvers should be removed to ensure that all electrical equipment does not exceed the higher allowable temperature. After the low-voltage circuit breaker trips, the cause of the trip should be checked before attempting to restore power. If the restoration is unsuccessful, the fault must be thoroughly identified and eliminated before power can be restored to prevent the accident from escalating. In the high-voltage distribution room of the box-type transformer, zinc oxide surge arresters should be installed. The installation method must be convenient for testing and disassembly and replacement. 

The grounding and neutral lines of the box-type substation share the same grounding grid. The grounding grid is usually formed by driving grounding stakes at the four corners of the foundation and then connecting them together. 

The box-type substation and the grounding grid must have two reliable connections. After the box-type substation is put into operation, the grounding connection points should be checked frequently to ensure they are not loose or rusted. Regularly measure the grounding resistance value, and the grounding resistance should not exceed 4Ω. 

The ring network switches, transformers, lightning arresters and other equipment in the high-voltage distribution device of the box-type substation should be inspected and maintained regularly. Defects should be repaired promptly and insulation preventive tests should be conducted regularly. If the box-type substation is out of service for more than 3 months, a comprehensive preventive test should be carried out before it is put back into operation. When replacing high-voltage fuses without breaking capacity, the transformer must be powered off. During the operation, the mechanical interlock must be correctly released and an insulated operating rod should be used. All cable holes for incoming and outgoing lines of the box-type substation should be sealed to prevent small animals from entering and causing accidents. 

The ground where the box-type substation is placed should be chosen at a higher position and not at a low-lying area to prevent rainwater from seeping into the box and affecting the operation of the equipment. When pouring the concrete platform, there should be a gap between the high and low voltage sides to facilitate the laying of the cable inlet and outlet. When excavating the foundation, if there is a ground composed of garbage or rotten soil, it must be dug down to the solid soil, then backfilled with good soil and compacted, and then filled with three-part soil or road slag to ensure the stability of the foundation.